Caulk gun holder



FIG. 1 is a front right isometric view of a caulk gun holder showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view. 

The ornamental design for a caulk gun holder, as shown. 